Question

Calcule: (equação de primeiro grau)

e) 2.(x – 10) = 32
f) 8.(x + 5) = 3.(2x – 5)

Answer 1

e)2x -20=32
2x=52
x=52/2
x=26

f)8x +40 = 6x -15
2x=-55
x=-27,5

Answer 2

→ Cálculo :

E) 2.(x - 10) = 32

2x - 20 = 32

2x = 32 + 20

2x = 52

x = 52 ÷ 2

x = 26

F) 8.(x + 5) = 3.(2x - 5)

8x + 40 = 6x - 15

8x - 6x = - 15 - 40

2x = -55

x = -55/2